syntax error: select * from sanpham where (idDM = menh or idDM in (select idDM from danhmuc where cap1 = menh) or idDM in (select idDM from danhmuc where dmCha = menh) or idDM in (select idDM from danhmuc where dmCha in (select idDM from danhmuc where cap1 = menh))) order by vitri, idSP DESC